To find out what each FET's value is, you have to look at the spec sheets for each individual FET you might want to use (out of the ones that will perform the job you need them to); they're all different.
Then look at the range of values those have.
There is a lot of discussion here on ES in various DIY controller and powerstage threads about gate charge, drivers, etc.
https://endless-sphere.com/forums/search.php?keywords=%22gate+charge%22&terms=all&author=&sc=1&sf=all&sr=posts&sk=t&sd=d&st=0&ch=300&t=0&submit=Search
If you've never designed a powerstage before, you will want to read all the development threads you can, because they point out lots of things you'll need to take care of, including the correct kind of measuring equipment, leads, techniques, etc., to be sure your design is actually working like you need it to.